Starch Irradiation: Physicochemical Properties, Anti-Nutritional Factors and Enzymatic Digestibility of Native and Electron Beam Irradiated Bitter Vetch (Vicia ervilia) Seeds

摘要

V. ervilia seeds were exposed to EB-irradiation (10, 20 and 30 kGy) and physicochemical properties, anti-nutritional factors and subsequent effects on digestibility [RDS, SDS, RS, in vitro and in vivo digestibility] in broilers were investigated. Irradiation had significant effects (p<0.05) on chemical compositions so that decreased moisture, crude protein, ether extract and crude fiber contents. EB-irradiation of seeds resulted in significant dose-dependent decrease of anti-nutritional factors (total phenols, tannins, condensed tannins, canavanine and trypsin inhibitor) (p<0.05). EB-irradiation decreased the proportion of RDS and SDS of V. ervilia seeds but increased the proportions of RS. The increase in RS content indicates that the irradiation induced the structural modification besides the chain degradation. Irradiation improved (p<0.05) in vivo digestibility of dry matter, crude protein, true protein and gross energy but decreased in vitro and in vivo starch digestibility.